Coupling system for image projection
First Claim
1. A video projector for projecting a video picture displayed on Braun tube means through lens means onto screen means such that a plurality of independent light beams emitted from said Braun tube means are composed with each other on said screen means, wherein a space between said Braun tube means and said lens means is filled with a silicon resin having a refractive index approximately the same as that of each of a glass faceplate of said Braun tube means and the material of said lens means, said silicon resin comprising at least two liquids which is in a liquid phase just after said at least two liquids are mixed and which is cured into a gel state, and wherein said lens means is supported by lens holder means so that said lens means is movable along an optical axis within said lens holder means.
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Accused Products
Abstract
In a video projector for projecting a video picture displayed on a Braun tube, the space between the Braun tube and a lens is filled with a medium having a refractive index substantially equal to those of both the glass faceplate of the braun tube and the material of the lens, and the medium is a silicon resin of the mixture of two liquids which is in liquid phase just after the mixing of two or three or above liquids but cured after lapse of a certain time into a gel state, and the lens is supported by a lens holder so that it can be moved freely along the optical axis within the lens holder.
22 Citations
3 Claims
- 1. A video projector for projecting a video picture displayed on Braun tube means through lens means onto screen means such that a plurality of independent light beams emitted from said Braun tube means are composed with each other on said screen means, wherein a space between said Braun tube means and said lens means is filled with a silicon resin having a refractive index approximately the same as that of each of a glass faceplate of said Braun tube means and the material of said lens means, said silicon resin comprising at least two liquids which is in a liquid phase just after said at least two liquids are mixed and which is cured into a gel state, and wherein said lens means is supported by lens holder means so that said lens means is movable along an optical axis within said lens holder means.
Specification